100508521 has 4 divisors (see below), whose sum is σ = 100715392. Its totient is φ = 100301652.

The previous prime is 100508497. The next prime is 100508531. The reversal of 100508521 is 125805001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100508521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100508492 and 100508501.

It is not an unprimeable number, because it can be changed into a prime (100508531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102705 + ... + 103678.

It is an arithmetic number, because the mean of its divisors is an integer number (25178848).

Almost surely, 2^100508521 is an apocalyptic number.

It is an amenable number.

100508521 is a deficient number, since it is larger than the sum of its proper divisors (206871).

100508521 is an equidigital number, since it uses as much as digits as its factorization.

100508521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206870.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 100508521 is about 10025.3938077265. The cubic root of 100508521 is about 464.9443352645.

The spelling of 100508521 in words is "one hundred million, five hundred eight thousand, five hundred twenty-one".